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glblas.c
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// Copyright (c) 2024 dmaivel
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include "glblas.h"
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <epoxy/egl.h>
// #include <EGL/egl.h>
#define FLOATS_PER_PIXEL 4
#define GLBLAS_ASSERT(x, ...) \
do { \
if (!(x)) { \
fflush(stdout); \
fprintf(stderr, "GLBLAS_ASSERT: %s:%d:%s: %s\n", __FILE__, __LINE__, __PRETTY_FUNCTION__, #x); \
fprintf(stderr, " || " __VA_ARGS__); \
abort(); \
} \
} while (0)
#define GLBLAS_ASSERT_STATUS(x, status) \
if (!(x)) { \
return status; \
}
#define IF_NOT_SUCCESS_RETURN(x) \
status = x; \
if (status) \
return status
#define MAX(x, y) (((x) > (y)) ? (x) : (y))
#define MIN(x, y) (((x) < (y)) ? (x) : (y))
typedef enum _glblas_internal_shader_op {
OP_GENERIC,
OP_SSCAL,
OP_SCOPY,
OP_SAXPY,
OP_SDOT,
OP_SDOTV2_MUL,
OP_SDOTV2_SUM,
OP_SASUM,
OP_SGEMM,
OP_SGEMM4x4,
OP_SGEMM4x4_R,
OP_MAX
} _glblas_internal_shader_op;
typedef struct _glblas_internal_context {
EGLDisplay dpy;
EGLint minor, major;
EGLint n_config;
EGLConfig config;
EGLSurface surface;
EGLContext egl_context;
int pbuffer_width;
int pbuffer_height;
void *pbuffer_host;
unsigned int VAO;
unsigned int VBO;
unsigned int EBO;
} _glblas_internal_context;
typedef struct _glblas_internal_buffer {
struct _glblas_internal_buffer *next;
_glblas_internal_context *context;
size_t size;
int width;
int height;
bool is_padded;
unsigned int framebuffer;
unsigned int texture_colorbuffer;
} _glblas_internal_buffer;
typedef struct _glblas_internal_shader {
const char * const src;
unsigned int id;
unsigned int program;
} _glblas_internal_shader;
static const char *const glblas_vs_src_generic =
"#version 330 core\n"
"layout (location = 0) in vec3 aPos;\n"
"layout (location = 1) in vec2 aTexCoord;\n"
"out vec2 TexCoord;\n"
"void main()\n"
"{\n"
" gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
" TexCoord = aTexCoord;\n"
"}";
static const char *const glblas_fs_src_sscal =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D x;\n"
"uniform float alpha;\n"
"uniform int incx;\n"
"uniform vec2 dims;\n"
"uniform int max_index;\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5) * 4;\n"
" vec4 vx = texture(x, TexCoord);\n"
" vx.r = ((index + 0) > max_index || (index + 0) % incx != 0) ? vx.r : vx.r * alpha;\n"
" vx.g = ((index + 1) > max_index || (index + 1) % incx != 0) ? vx.g : vx.g * alpha;\n"
" vx.b = ((index + 2) > max_index || (index + 2) % incx != 0) ? vx.b : vx.b * alpha;\n"
" vx.a = ((index + 3) > max_index || (index + 3) % incx != 0) ? vx.a : vx.a * alpha;\n"
" FragColor = vx;\n"
"}";
static const char *const glblas_fs_src_scopy =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D x;\n"
"uniform sampler2D y;\n"
"uniform vec2 dims;\n"
"uniform int max_index;\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5) * 4;\n"
" vec2 xTexCoord;\n"
" vec4 vx = texture(x, TexCoord);\n"
" vec4 vy = texture(y, TexCoord);\n"
" vy.r = ((index + 0) > max_index) ? vy.r : vx.r;\n"
" vy.g = ((index + 1) > max_index) ? vy.g : vx.g;\n"
" vy.b = ((index + 2) > max_index) ? vy.b : vx.b;\n"
" vy.a = ((index + 3) > max_index) ? vy.a : vx.a;\n"
" FragColor = vy;\n"
"}";
static const char *const glblas_fs_src_scopyv2 =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D x;\n"
"uniform sampler2D y;\n"
"uniform int incx;\n"
"uniform int incy;\n"
"uniform vec2 dims;\n"
"uniform int max_index;\n"
"#define kernel(offs, elem) \\\n"
" if ((index + offs) < max_index && (index + offs) % incy == 0) { \\\n"
" int xindex = ((index + offs) + ((index + offs) / incy) * (incx - incy)); \\\n"
" xTexCoord.y = float((xindex / 4) / int(dims.x)) / dims.y; \\\n"
" xTexCoord.x = float((xindex / 4) % int(dims.x)) / dims.x; \\\n"
" vec4 vx = texture(x, xTexCoord); \\\n"
" float val; \\\n"
" switch (xindex % 4) { \\\n"
" case 0: val = vx.r; break; \\\n"
" case 1: val = vx.g; break; \\\n"
" case 2: val = vx.b; break; \\\n"
" case 3: val = vx.a; break; \\\n"
" } \\\n"
" vy.elem = val; \\\n"
" }\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5) * 4;\n"
" vec4 vy = texture(y, TexCoord);\n"
" vec2 xTexCoord;\n"
" kernel(0, r);\n"
" kernel(1, g);\n"
" kernel(2, b);\n"
" kernel(3, a);\n"
" FragColor = vy;\n"
"}";
static const char *const glblas_fs_src_saxpy =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D x;\n"
"uniform sampler2D y;\n"
"uniform float alpha;\n"
"uniform vec2 dims;\n"
"uniform int max_index;\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5) * 4;\n"
" vec2 xTexCoord;\n"
" vec4 vx = texture(x, TexCoord);\n"
" vec4 vy = texture(y, TexCoord);\n"
" vy.r = ((index + 0) > max_index) ? vy.r : vx.r * alpha + vy.r;\n"
" vy.g = ((index + 1) > max_index) ? vy.g : vx.g * alpha + vy.g;\n"
" vy.b = ((index + 2) > max_index) ? vy.b : vx.b * alpha + vy.b;\n"
" vy.a = ((index + 3) > max_index) ? vy.a : vx.a * alpha + vy.a;\n"
" FragColor = vy;\n"
"}";
static const char *const glblas_fs_src_saxpyv2 =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D x;\n"
"uniform sampler2D y;\n"
"uniform float alpha;\n"
"uniform int incx;\n"
"uniform int incy;\n"
"uniform vec2 dims;\n"
"uniform int max_index;\n"
"#define kernel(offs, elem) \\\n"
" if ((index + offs) < max_index && (index + offs) % incy == 0) { \\\n"
" int xindex = ((index + offs) + ((index + offs) / incy) * (incx - incy)); \\\n"
" xTexCoord.y = float((xindex / 4) / int(dims.x)) / dims.y; \\\n"
" xTexCoord.x = float((xindex / 4) % int(dims.x)) / dims.x; \\\n"
" vec4 vx = texture(x, xTexCoord); \\\n"
" float val; \\\n"
" switch (xindex % 4) { \\\n"
" case 0: val = vx.r; break; \\\n"
" case 1: val = vx.g; break; \\\n"
" case 2: val = vx.b; break; \\\n"
" case 3: val = vx.a; break; \\\n"
" } \\\n"
" vy.elem += val * alpha; \\\n"
" }\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5) * 4;\n"
" vec4 vy = texture(y, TexCoord);\n"
" vec2 xTexCoord;\n"
" kernel(0, r);\n"
" kernel(1, g);\n"
" kernel(2, b);\n"
" kernel(3, a);\n"
" FragColor = vy;\n"
"}";
// don't use
static const char *const glblas_fs_src_sdot =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D x;\n"
"uniform sampler2D y;\n"
"uniform int incx;\n"
"uniform int incy;\n"
"uniform vec2 dims;\n"
"uniform int max_index;\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5) * 4;\n"
" if (index != 0) { FragColor = vec4(1, 0, 0, 0); return; }\n"
" int ix = 0;\n"
" int iy = 0;\n"
" vec4 result = vec4(0, 0, 0, 0);\n"
" for (int i = 0; i < max_index; i += 4) {\n"
" vec2 xTexCoord;\n"
" xTexCoord.y = floor((ix) / dims.x) / dims.y;\n"
" xTexCoord.x = ((ix) - xTexCoord.y * dims.x * dims.y) / dims.x;\n"
" vec2 yTexCoord;\n"
" yTexCoord.y = floor((iy) / dims.x) / dims.y;\n"
" yTexCoord.x = ((iy) - yTexCoord.y * dims.x * dims.y) / dims.x;\n"
" vec4 vx = texture(x, xTexCoord);\n"
" vec4 vy = texture(y, yTexCoord);\n"
" vec4 vz = vx * vy;\n"
" result.r += ((ix + 0) % incx != 0 || (iy + 0) % incy != 0) ? 0 : vz.r;\n"
" result.r += ((ix + 1) % incx != 0 || (iy + 1) % incy != 0) ? 0 : vz.g;\n"
" result.r += ((ix + 2) % incx != 0 || (iy + 2) % incy != 0) ? 0 : vz.b;\n"
" result.r += ((ix + 3) % incx != 0 || (iy + 3) % incy != 0) ? 0 : vz.a;\n"
" ix += incx * 4;\n"
" iy += incy * 4;\n"
" }\n"
" FragColor = result;\n"
"}";
static const char *const glblas_fs_src_sdotv2_mul =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D x;\n"
"uniform sampler2D y;\n"
"uniform int incx;\n"
"uniform int incy;\n"
"uniform vec2 dims;\n"
"uniform int max_index;\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5) * 4;\n"
" vec2 xTexCoord;\n"
" vec4 vx = texture(x, TexCoord);\n"
" vec4 vy = texture(y, TexCoord);\n"
" vy.r = ((index + 0) > max_index) ? vy.r : vx.r * vy.r;\n"
" vy.g = ((index + 1) > max_index) ? vy.g : vx.g * vy.g;\n"
" vy.b = ((index + 2) > max_index) ? vy.b : vx.b * vy.b;\n"
" vy.a = ((index + 3) > max_index) ? vy.a : vx.a * vy.a;\n"
" FragColor = vy;\n"
"}";
static const char *const glblas_fs_src_sdotv3_mul =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D x;\n"
"uniform sampler2D y;\n"
"uniform int incx;\n"
"uniform int incy;\n"
"uniform vec2 dims;\n"
"uniform int max_index;\n"
"#define kernel(offs, elem) \\\n"
" if ((index + offs) < max_index && (index + offs) % incy == 0) { \\\n"
" int xindex = ((index + offs) + ((index + offs) / incy) * (incx - incy)); \\\n"
" xTexCoord.y = float((xindex / 4) / int(dims.x)) / dims.y; \\\n"
" xTexCoord.x = float((xindex / 4) % int(dims.x)) / dims.x; \\\n"
" vec4 vx = texture(x, xTexCoord); \\\n"
" float val; \\\n"
" switch (xindex % 4) { \\\n"
" case 0: val = vx.r; break; \\\n"
" case 1: val = vx.g; break; \\\n"
" case 2: val = vx.b; break; \\\n"
" case 3: val = vx.a; break; \\\n"
" } \\\n"
" vy.elem *= val; \\\n"
" }\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5) * 4;\n"
" vec4 vy = texture(y, TexCoord);\n"
" vec2 xTexCoord;\n"
" kernel(0, r);\n"
" kernel(1, g);\n"
" kernel(2, b);\n"
" kernel(3, a);\n"
" FragColor = vy;\n"
"}";
static const char *const glblas_fs_src_sdotv2_sum =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D x;\n"
"uniform int incx;\n"
"uniform vec2 dims;\n"
"uniform int max_index;\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5);\n" // we want index of vector, so don't mul by 4
" if (max_index == 1) {\n"
" vec4 vy = abs(texture(x, TexCoord));\n"
" FragColor = index == 0 ? vec4(vy.r + vy.g + vy.b + vy.a, 0, 0, 0) : vec4(1, 0, 0, 0);\n"
" return;\n"
" }\n"
" int halfway = ((max_index / 4));\n" // to-do: document why this is 4 instead of 2?
" if (index > halfway) { FragColor = vec4(0, 0, 0, 0); return; }\n"
" vec2 xTexCoord;\n"
" xTexCoord.y = float(((index + halfway) / incx) / int(dims.x)) / dims.y;\n"
" xTexCoord.x = float(((index + halfway) / incx) % int(dims.x)) / dims.x;\n"
" vec4 vx = (texture(x, xTexCoord));\n" // CURRENT + HALFWAY
" vec4 vy = (texture(x, TexCoord));\n" // CURRENT
" vy.r = ((index + 0) > max_index || (index + 0) % incx != 0) ? vy.r : vx.r + vy.r;\n"
" vy.g = ((index + 1) > max_index || (index + 1) % incx != 0) ? vy.g : vx.g + vy.g;\n"
" vy.b = ((index + 2) > max_index || (index + 2) % incx != 0) ? vy.b : vx.b + vy.b;\n"
" vy.a = ((index + 3) > max_index || (index + 3) % incx != 0) ? vy.a : vx.a + vy.a;\n"
" FragColor = vy;\n"
"}";
static const char *const glblas_fs_src_sasum =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D x;\n"
"uniform int incx;\n"
"uniform vec2 dims;\n"
"uniform int max_index;\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5);\n" // we want index of vector, so don't mul by 4
" if (max_index == 1) {\n"
" vec4 vy = abs(texture(x, TexCoord));\n"
" FragColor = index == 0 ? vec4(vy.r + vy.g + vy.b + vy.a, 0, 0, 0) : vec4(1, 0, 0, 0);\n"
" return;\n"
" }\n"
" int halfway = ((max_index / 4));\n" // to-do: document why this is 4 instead of 2?
" if (index > halfway) { FragColor = vec4(0, 0, 0, 0); return; }\n"
" vec2 xTexCoord;\n"
" xTexCoord.y = float(((index + halfway) / incx) / int(dims.x)) / dims.y;\n"
" xTexCoord.x = float(((index + halfway) / incx) % int(dims.x)) / dims.x;\n"
" vec4 vx = abs(texture(x, xTexCoord));\n" // CURRENT + HALFWAY
" vec4 vy = abs(texture(x, TexCoord));\n" // CURRENT
" vy.r = ((index + 0) > max_index || (index + 0) % incx != 0) ? vy.r : vx.r + vy.r;\n"
" vy.g = ((index + 1) > max_index || (index + 1) % incx != 0) ? vy.g : vx.g + vy.g;\n"
" vy.b = ((index + 2) > max_index || (index + 2) % incx != 0) ? vy.b : vx.b + vy.b;\n"
" vy.a = ((index + 3) > max_index || (index + 3) % incx != 0) ? vy.a : vx.a + vy.a;\n"
" FragColor = vy;\n"
"}";
static const char *const glblas_fs_src_sgemm =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D a;\n"
"uniform sampler2D b;\n"
"uniform sampler2D c;\n"
"uniform int lda;\n" // M
"uniform int ldb;\n" // K
"uniform int ldc;\n" // M
"uniform bool aT;\n"
"uniform bool bT;\n"
"uniform float alpha;\n"
"uniform float beta;\n"
"uniform vec2 dims\n; /* .x = M, .y = N */\n"
"uniform vec2 adims;\n"
"uniform vec2 bdims;\n"
"uniform int m;\n"
"uniform int n;\n"
"uniform int k;\n"
"uniform int max_index;\n"
"#define kernel(offs, elem) \\\n"
" if ((index + offs) < max_index) { \\\n"
" float val = 0; \\\n"
" int i = (index + offs) % m; \\\n" // row
" int j = (index + offs) / m; \\\n" // col
" for (int l = 0; l < k; l++) { \\\n"
" int aindex = aT ? lda * i + l : lda * l + i; \\\n"
" int bindex = bT ? ldb * l + j : ldb * j + l; \\\n"
" aTexCoord.y = float((aindex / 4) / ax) / ay; \\\n"
" aTexCoord.x = float((aindex / 4) % ax) / ax; \\\n"
" bTexCoord.y = float((bindex / 4) / bx) / by; \\\n"
" bTexCoord.x = float((bindex / 4) % bx) / bx; \\\n"
" vec4 va = texture(a, aTexCoord); \\\n"
" vec4 vb = texture(b, bTexCoord); \\\n"
" float v0, v1; \\\n"
" switch (aindex % 4) { \\\n"
" case 0: v0 = va.r; break; \\\n"
" case 1: v0 = va.g; break; \\\n"
" case 2: v0 = va.b; break; \\\n"
" case 3: v0 = va.a; break; \\\n"
" } \\\n"
" switch (bindex % 4) { \\\n"
" case 0: v1 = vb.r; break; \\\n"
" case 1: v1 = vb.g; break; \\\n"
" case 2: v1 = vb.b; break; \\\n"
" case 3: v1 = vb.a; break; \\\n"
" } \\\n"
" val += v0 * v1; \\\n"
" } \\\n"
" vy.elem = (alpha * val) + (vy.elem * beta); \\\n"
" }\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5) * 4;\n"
" vec4 vy = (beta != 0.f) ? texture(c, TexCoord) : vec4(0, 0, 0, 0);\n"
" vec2 aTexCoord;\n"
" vec2 bTexCoord;\n"
" int ax = aT ? k : int(adims.x);\n"
" int ay = aT ? int(adims.x) : k;\n"
" int bx = bT ? int(bdims.y) : k;\n"
" int by = bT ? k : int(bdims.y);\n"
" kernel(0, r);\n"
" kernel(1, g);\n"
" kernel(2, b);\n"
" kernel(3, a);\n"
" FragColor = vy;\n"
"}";
static const char *const glblas_fs_src_sgemm4x4 =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D a;\n"
"uniform sampler2D b;\n"
"uniform sampler2D c;\n"
"uniform int lda;\n" // M
"uniform int ldb;\n" // K
"uniform int ldc;\n" // M
"uniform bool aT;\n"
"uniform bool bT;\n"
"uniform float alpha;\n"
"uniform float beta;\n"
"uniform vec2 dims\n; /* .x = M, .y = N */\n"
"uniform vec2 adims;\n"
"uniform vec2 bdims;\n"
"uniform int m;\n"
"uniform int n;\n"
"uniform int k;\n"
"uniform int max_index;\n"
"#define kernel(offs, elem) \\\n"
" if ((index + offs) < max_index) { \\\n"
" float val = 0; \\\n"
" int i = (index + offs) % m; \\\n" // row
" int j = (index + offs) / m; \\\n" // col
" for (int l = 0; l < k; l += 4) { \\\n"
" int aindex = /*aT ? lda * l + i :*/ lda * i + l; \\\n" // think this is right
" int bindex = /*bT ? ldb * l + j :*/ ldb * j + l; \\\n"
" aTexCoord.y = float((aindex / 4) / ax) / ay; \\\n"
" aTexCoord.x = float((aindex / 4) % ax) / ax; \\\n"
" bTexCoord.y = float((bindex / 4) / bx) / by; \\\n"
" bTexCoord.x = float((bindex / 4) % bx) / bx; \\\n"
" vec4 va = texture(a, aTexCoord); \\\n"
" vec4 vb = texture(b, bTexCoord); \\\n"
" vb = va * vb; \\\n"
" val += vb.r + vb.g + vb.b + vb.a; \\\n"
" } \\\n"
" vy.elem = (alpha * val) + (vy.elem * beta); \\\n"
" }\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5) * 4;\n"
" vec4 vy = (beta != 0.f) ? texture(c, TexCoord) : vec4(0, 0, 0, 0);\n"
" vec2 aTexCoord;\n"
" vec2 bTexCoord;\n"
" int ax = aT ? k : int(adims.x);\n"
" int ay = aT ? int(adims.x) : k;\n"
" int bx = bT ? int(bdims.y) : k;\n"
" int by = bT ? k : int(bdims.y);\n"
" kernel(0, r);\n"
" kernel(1, g);\n"
" kernel(2, b);\n"
" kernel(3, a);\n"
" FragColor = vy;\n"
"}";
static const char *const glblas_fs_src_sgemm4x4_reorder =
"#version 330 core\n"
"out vec4 FragColor;\n"
"in vec2 TexCoord;\n"
"uniform sampler2D x;\n"
"uniform sampler2D y;\n"
"uniform vec2 dims;\n"
"uniform int max_index;\n"
"#define kernel(offs, elem) \\\n"
" if ((index + offs) < max_index) { \\\n"
" int xindex = (fragm + ((max_index / 4) * offs)) /4; \\\n"
" xTexCoord.y = float((xindex) / int(dims.x)) / dims.y; \\\n"
" xTexCoord.x = float((xindex) % int(dims.x)) / dims.x; \\\n"
" vec4 vx = texture(x, xTexCoord); \\\n"
" float val; \\\n"
" switch (fragm % 4) { \\\n"
" case 0: val = vx.r; break; \\\n"
" case 1: val = vx.g; break; \\\n"
" case 2: val = vx.b; break; \\\n"
" case 3: val = vx.a; break; \\\n"
" } \\\n"
" vy.elem = val; \\\n"
" }\n"
"void main()\n"
"{\n"
" int index = int(gl_FragCoord.y - 0.5) * int(dims.x) + int(gl_FragCoord.x - 0.5) * 4;\n"
" int fragm = index / 4;\n"
" vec4 vy = vec4(0, 0, 0, 0);\n"
" vec2 xTexCoord;\n"
" kernel(0, r);\n"
" kernel(1, g);\n"
" kernel(2, b);\n"
" kernel(3, a);\n"
" FragColor = vy;\n"
"}";
_glblas_internal_shader shaders[OP_MAX] = {
[OP_GENERIC] = { .src = glblas_vs_src_generic },
[OP_SSCAL] = { .src = glblas_fs_src_sscal },
[OP_SCOPY] = { .src = glblas_fs_src_scopyv2 },
[OP_SAXPY] = { .src = glblas_fs_src_saxpyv2 },
[OP_SDOT] = { .src = glblas_fs_src_sdot },
[OP_SDOTV2_MUL] = { .src = glblas_fs_src_sdotv3_mul },
[OP_SDOTV2_SUM] = { .src = glblas_fs_src_sdotv2_sum },
[OP_SASUM] = { .src = glblas_fs_src_sasum },
[OP_SGEMM] = { .src = glblas_fs_src_sgemm },
[OP_SGEMM4x4] = { .src = glblas_fs_src_sgemm4x4 },
[OP_SGEMM4x4_R] = { .src = glblas_fs_src_sgemm4x4_reorder }
};
_glblas_internal_buffer *buffers = NULL;
static const EGLint egl_generic_config[] = {
EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
EGL_BLUE_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_RED_SIZE, 8,
EGL_DEPTH_SIZE, 8,
EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
EGL_NONE
};
static void *dynarr_alloc(void **root, size_t next_offset, size_t size)
{
if (*root == NULL) {
*root = calloc(1, size);
return *root;
}
void *next;
for (next = *root; *(void**)(next + next_offset); next = *(void**)(next + next_offset));
*(void**)(next + next_offset) = calloc(1, size);
return *(void**)(next + next_offset);
}
static void dynarr_free_element(void **root, size_t next_offset, void *data)
{
void *prev = NULL;
for (void *elem = *root; elem;) {
void *next = *(void**)(elem + next_offset);
if (elem == data) {
if (prev == NULL)
*root = next;
else
*(void**)(prev + next_offset) = next;
free(elem);
}
else
prev = elem;
elem = next;
}
}
static void dynarr_free(void **root, size_t next_offset)
{
if (*(void**)(root)) {
dynarr_free(*(void**)(root + next_offset), next_offset);
free(*root);
}
}
static bool egl_initialize(_glblas_internal_context *context, int pbuffer_width, int pbuffer_height)
{
EGLint pb_attr[] = {
EGL_WIDTH, pbuffer_width,
EGL_HEIGHT, pbuffer_height,
EGL_NONE,
};
context->dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (!eglInitialize(context->dpy, &context->major, &context->minor))
return false;
eglChooseConfig(context->dpy, egl_generic_config, &context->config, 1, &context->n_config);
context->surface = eglCreatePbufferSurface(context->dpy, context->config, pb_attr);
eglBindAPI(EGL_OPENGL_API);
context->egl_context = eglCreateContext(context->dpy, context->config, EGL_NO_CONTEXT, NULL);
return eglMakeCurrent(context->dpy, context->surface, context->surface, context->egl_context) != EGL_NOT_INITIALIZED;
}
static int check_shader_errors(GLuint shader)
{
GLint status;
glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
if (status == GL_FALSE) {
GLint length;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &length);
char* log = (char*)malloc(length);
glGetShaderInfoLog(shader, length, NULL, log);
printf("%s", log);
free(log);
}
return status;
}
glblasStatus_t glblasCreate(glblasHandle_t *handle, int width, int height)
{
_glblas_internal_context *context = calloc(1, sizeof(_glblas_internal_context));
if (!egl_initialize(context, width, height)) {
free(context);
return GLBLAS_STATUS_ALLOC_FAILED;
}
// compile shaders
for (int i = 0; i < OP_MAX; i++) {
shaders[i].id = glCreateShader(i != OP_GENERIC ? GL_FRAGMENT_SHADER : GL_VERTEX_SHADER);
glShaderSource(shaders[i].id, 1, &shaders[i].src, NULL);
glCompileShader(shaders[i].id);
GLBLAS_ASSERT(check_shader_errors(shaders[i].id), "failed to compile shader %d\n", i);
// GLBLAS_ASSERT_STATUS(check_shader_errors(shaders[i].id), GLBLAS_STATUS_NOT_SUPPORTED);
}
// link shaders
for (int i = OP_GENERIC + 1; i < OP_MAX; i++) {
shaders[i].program = glCreateProgram();
glAttachShader(shaders[i].program, shaders[OP_GENERIC].id);
glAttachShader(shaders[i].program, shaders[i].id);
glLinkProgram(shaders[i].program);
glDeleteShader(shaders[i].id);
}
// delete generic
glDeleteShader(shaders[OP_GENERIC].id);
float vertices[] = {
// positions // texture coords
1.0f, 1.0f, 0.0f, 1.0f, 1.0f, // top right
1.0f, -1.0f, 0.0f, 1.0f, 0.0f, // bottom right
-1.0f, -1.0f, 0.0f, 0.0f, 0.0f, // bottom left
-1.0f, 1.0f, 0.0f, 0.0f, 1.0f // top left
};
unsigned int indices[] = {
0, 1, 3, // first triangle
1, 2, 3 // second triangle
};
glGenVertexArrays(1, &context->VAO);
glGenBuffers(1, &context->VBO);
glGenBuffers(1, &context->EBO);
glBindVertexArray(context->VAO);
glBindBuffer(GL_ARRAY_BUFFER, context->VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, context->EBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
// position attribute
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)0);
glEnableVertexAttribArray(0);
// texture coord attribute
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)(3 * sizeof(float)));
glEnableVertexAttribArray(1);
context->pbuffer_host = calloc(width * height * FLOATS_PER_PIXEL, sizeof(float));
context->pbuffer_width = width;
context->pbuffer_height = height;
*handle = context;
return GLBLAS_STATUS_SUCCESS;
}
void glblasSync()
{
glFinish();
}
void glblasDestroy(glblasHandle_t ctx)
{
_glblas_internal_context *context = (_glblas_internal_context*)ctx;
glDeleteVertexArrays(1, &context->VAO);
glDeleteBuffers(1, &context->VBO);
glDeleteBuffers(1, &context->EBO);
for (_glblas_internal_buffer *buffer = buffers; buffer;) {
_glblas_internal_buffer *b = buffer;
buffer = b->next;
glblasFree(b);
}
dynarr_free((void**)&buffers, 0);
for (int i = 0; i < OP_MAX; i++)
glDeleteProgram(shaders[i].program);
free(ctx);
}
static glblasStatus_t get_texture_dimensions(size_t size, int max_width, int max_height, int *out_width, int *out_height, bool *is_padded)
{
// transform size to contain number of floats
size_t count = (size + (FLOATS_PER_PIXEL * sizeof(float)) - 1) / (FLOATS_PER_PIXEL * sizeof(float));
if (is_padded)
*is_padded = roundf((float)size / (FLOATS_PER_PIXEL * sizeof(float))) != ((float)size / (FLOATS_PER_PIXEL * sizeof(float)));
// check if buffer is tiny
if (count <= max_width) {
*out_width = count;
*out_height = 1;
return GLBLAS_STATUS_SUCCESS;
}
// otherwise, (max_width, variable height)
*out_width = max_width;
*out_height = (count + max_width - 1) / max_width;
return (*out_width <= max_width && *out_height <= max_height) ? GLBLAS_STATUS_SUCCESS : GLBLAS_STATUS_DIMENSION_OVERFLOW;
}
glblasMemory_t glblasMalloc(glblasHandle_t ctx, size_t size)
{
_glblas_internal_context *context = (_glblas_internal_context*)ctx;
_glblas_internal_buffer *buf = dynarr_alloc((void**)&buffers, 0, sizeof(_glblas_internal_buffer));
GLBLAS_ASSERT(size <= context->pbuffer_width * context->pbuffer_height * sizeof(float) * FLOATS_PER_PIXEL, "size (%ld) is out of bounds (max = %ld)\n", size, context->pbuffer_width * context->pbuffer_height * sizeof(float) * FLOATS_PER_PIXEL);
buf->size = size;
get_texture_dimensions(size, context->pbuffer_width, context->pbuffer_height, &buf->width, &buf->height, &buf->is_padded);
glGenFramebuffers(1, &buf->framebuffer);
glGenTextures(1, &buf->texture_colorbuffer);
glBindFramebuffer(GL_FRAMEBUFFER, buf->framebuffer);
glBindTexture(GL_TEXTURE_2D, buf->texture_colorbuffer);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, buf->width, buf->height, 0, GL_RGBA, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); // GL_LINEAR changes the values, so use nearest
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, buf->texture_colorbuffer, 0);
buf->context = context;
return (glblasMemory_t)buf;
}
static inline _glblas_internal_buffer *get_buffer_from_address(size_t addr)
{
for (_glblas_internal_buffer *buf = buffers; buf; buf = buf->next) {
if (addr == (size_t)buf)
return buf;
}
return NULL;
}
glblasStatus_t glblasMemcpy(void *dst, void *src, size_t size, glblasMemcpyKind_t kind)
{
_glblas_internal_buffer *buf_dst = get_buffer_from_address((size_t)dst);
_glblas_internal_buffer *buf_src = get_buffer_from_address((size_t)src);
_glblas_internal_buffer *buf;
if (kind == glblasMemcpyInfer) {
// GLBLAS_ASSERT(buf_dst != NULL || buf_src != NULL, "invalid addresses (%p) (%p)\n", buf_dst, buf_src);
GLBLAS_ASSERT_STATUS(buf_dst != NULL || buf_src != NULL, GLBLAS_STATUS_INVALID_VALUE);
if (buf_dst && buf_src)
kind = glblasMemcpyDeviceToDevice;
else if (buf_dst == NULL)
kind = glblasMemcpyDeviceToHost;
else
kind = glblasMemcpyHostToDevice;
}
switch (kind) {
case glblasMemcpyHostToDevice:
buf = buf_dst;
break;
case glblasMemcpyDeviceToHost:
buf = buf_src;
break;
case glblasMemcpyDeviceToDevice:
// GLBLAS_ASSERT(false, "prefer glblasScopy over glblasMemcpyDeviceToDevice\n");
// buf = buf_dst;
// break;
return GLBLAS_STATUS_NOT_SUPPORTED;
default:
break;
}
// GLBLAS_ASSERT(buf, "invalid buffer\n");
// GLBLAS_ASSERT(size <= buf->size, "size (%ld) is likely too large, buffer size is %ld\n", size, buf->size);
GLBLAS_ASSERT_STATUS(buf && size <= buf->size, GLBLAS_STATUS_INVALID_VALUE);
_glblas_internal_context *context = buf->context;
switch (kind) {
case glblasMemcpyHostToDevice:
if (buf->is_padded || buf->size != size) {
memcpy(context->pbuffer_host, src, size);
glBindTexture(GL_TEXTURE_2D, buf->texture_colorbuffer);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, buf->width, buf->height, GL_RGBA, GL_FLOAT, context->pbuffer_host);
}
else {
glBindTexture(GL_TEXTURE_2D, buf->texture_colorbuffer);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, buf->width, buf->height, GL_RGBA, GL_FLOAT, src);
}
break;
case glblasMemcpyDeviceToHost:
if (buf->is_padded || buf->size != size) {
glBindFramebuffer(GL_FRAMEBUFFER, buf->framebuffer);
glReadPixels(0, 0, buf->width, buf->height, GL_RGBA, GL_FLOAT, context->pbuffer_host);
memcpy(dst, context->pbuffer_host, size);
}
else {
glBindFramebuffer(GL_FRAMEBUFFER, buf->framebuffer);
glReadPixels(0, 0, buf->width, buf->height, GL_RGBA, GL_FLOAT, dst);
}
break;
case glblasMemcpyDeviceToDevice:
glblasMemcpy(context->pbuffer_host, src, buf->size, glblasMemcpyDeviceToHost);
glblasMemcpy(dst, context->pbuffer_host, buf->size, glblasMemcpyHostToDevice);
break;
default:
break;
}
return GLBLAS_STATUS_SUCCESS;
}
void glblasFree(glblasMemory_t buf)
{
_glblas_internal_buffer *buffer = (_glblas_internal_buffer*)buf;
glDeleteFramebuffers(1, &buffer->framebuffer);
glDeleteTextures(1, &buffer->texture_colorbuffer);
dynarr_free_element((void**)&buffers, 0, buf);
}
// swap x & y
glblasStatus_t glblasSswap(int N, glblasMemory_t x, int incx, glblasMemory_t y, int incy)
{
// infer context from x
glblasMemory_t temp = glblasMalloc(((_glblas_internal_buffer*)x)->context, N * sizeof(float));
glblasScopy(N, x, 1, temp, 1);
glblasScopy(N, y, incy, x, incx); // copy y into x
glblasScopy(N, temp, incx, y, incy); // copy x into y
glblasFree(temp);
return GLBLAS_STATUS_SUCCESS;
}
static glblasStatus_t get_op_dims(const size_t N, _glblas_internal_buffer *dev, _glblas_internal_context *context, int *width, int *height)
{
if (N == dev->size / sizeof(float)) {
*width = dev->width;
*height = dev->height;
}
else {
get_texture_dimensions(N * sizeof(float), context->pbuffer_width, context->pbuffer_height, width, height, NULL);
}
return GLBLAS_STATUS_SUCCESS;
}
// x = a*x
glblasStatus_t glblasSscal(int N, const float alpha, glblasMemory_t x, int incx)
{
_glblas_internal_buffer *device_x = (_glblas_internal_buffer*)x;
_glblas_internal_context *context = device_x->context;
glblasStatus_t status;
int width, height;
IF_NOT_SUCCESS_RETURN(get_op_dims(N, device_x, context, &width, &height));
glViewport(0, 0, width, height);
glUseProgram(shaders[OP_SSCAL].program);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, device_x->texture_colorbuffer);
glUniform1i(glGetUniformLocation(shaders[OP_SSCAL].program, "x"), 0);
glUniform1f(glGetUniformLocation(shaders[OP_SSCAL].program, "alpha"), alpha);
glUniform2f(glGetUniformLocation(shaders[OP_SSCAL].program, "dims"), width, height);
glUniform1i(glGetUniformLocation(shaders[OP_SSCAL].program, "max_index"), N);
glUniform1i(glGetUniformLocation(shaders[OP_SSCAL].program, "incx"), incx);
glBindFramebuffer(GL_FRAMEBUFFER, device_x->framebuffer);
glBindVertexArray(context->VAO);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
return GLBLAS_STATUS_SUCCESS;
}
// copy x into y
glblasStatus_t glblasScopy(int N, const glblasMemory_t x, int incx, glblasMemory_t y, int incy)
{
_glblas_internal_buffer *device_x = (_glblas_internal_buffer*)x;
_glblas_internal_buffer *device_y = (_glblas_internal_buffer*)y;
_glblas_internal_context *context = device_x->context;
glblasStatus_t status;